Unit Name: Nyarling Formation
Unit Type: Lithostratigraphic
Rank: Formation
Status: Formal
Usage: Currently in use
Age Interval: Middle Devonian (397.5 - 385.3 ma)
Age Justification: None. Age based on stratigraphic position.
Province/Territory: Alberta; Northwest Territories

Originator: A.W. Norris, 1965.

Type Locality:
Road cuts and exposures adjacent to road connecting Salt River and Hay River Settlement; 60 deg 09'N, 113 deg 30'W.

Distribution:
Calculated 128 m (420 ft). It is discontinuously and poorly exposed in the northwest bending belt about 45 km (28 mi) wide extending south from the south flank of the Presqu'ile dolomite about 16 km (10 mi) south of the south shore of Great Slave Lake into northern Alberta.

Lithology:
Mainly gypsum with minor brown thinly bedded, fissile, fine-grained to aphanitic, limestone.

Relationship:
It corresponds to map Unit 10 of Douglas (1959) and occurs stratigraphically between the Little Buffalo Fm (below) and the Slave Point Fm. Neither contact is exposed. Possibly stratigraphic equivalent to the upper 4/5 of the Pine Point Fm, all of the Presqu'ile and Sulphur Point formations and in places it appears to be equivalent to the lower part of the Slave Point Fm. Appears to occupy roughly the stratigraphic position (Law, 1955a, b) of the combined Muskeg and Watt Mountain formations and Fort Vermilion member of the Slave Point Fm of northwestern Alberta.

Other Citations:
Douglas, 1959; L.H. Green, 1972; Law, 1955a, 1955b; A.W. Norris, 1965.

Source: CSPG Lexicon of Canadian Stratigraphy, Volume 2, Yukon Territory and District of Mackenzie; L.V. Hills, E.V. Sangster and L.B. Suneby (editor)
Contributor: L.V. Hills; A.W. Norris
Entry Reviewed: Yes
Name Set: Lithostratigraphic Lexicon
LastChange: 01 Jul 2004